Weighing-machine.



WEIGHING MACHINE.

APPLICATION FILED MAY 18, 1912.

Patented May 6, 1913.

8 SHEETS-SHEET 1.

J. DOBSON.

WEIGHING MKGHINB.

APPLICATION FILED MAY 18, 1912.

1,061,229. Patented May 6, 1913.

8 SHEETS-SHEET 2. F 5 H624. 5 /4- I '/4. W

J. DOBSON.

WEIGHING MACHINE. APPLIOATIO! rum in: 1a, 1912.

1,061,229. Patented May 6, 1913.

8 SHEETS-SHEET 3.

' the pointer over pulls it positively down;

[m8 DODSON, OF BIRMINGHAM, ENGLAND.

WEIGHING-HAGHINE.

To all whom it concern: 7

Be it known that I, J aims Dosson, a'sub- 'ect of the King of England,residing at irmingham, in the county of Warwick, England, have inventednew and useful Imrovements in or Connected with Weighing-Machines, ofwhich the following is a specification.

This invention has reference to weighing machines adapted for use on ashop counter, or under like conditions, or for. similar purposes, andgenerally where theloads to be weighed are com aratively small; and moreparticularly to e type of such machines, wherein 0, art of the load isindicated on or by a e automatically, by the machine, and there is usedin connection with it, a

movable resistance weight which varies in resistance according to itsposition, and which, plus another wei ht ap lied to the weight willbalance t e loa The c ief object and efiect of the present inventioni'sto provide improvements in connection with' machines of this kind,whereby sudden 'ar or stress on theindicating mechanism, y applyinggoodson the pan suddenly, or taking of! suddenly, or b putting or of thepan weights sud enly, is almost In connection with the scale weight pan,and the indicating mechanism of a weighing machine accor tothisinvention, there is a constant wei t used, which, when the weight-panrises will be acted upon or lifted by it, or ressed by it upward, andthereby when li ed permits the movement of the indicator from'zero;while when it falls by the wei ht pan fallirllg, it moves e scale towazero. Bewlegght' which'acts in connection tween this with the we' withit, and t ates, or which operates in connection with it, there is a freemovement arrangement, whereby the. we' t, when-moved upward, does notarm; w

t pan; or a part connected when t moves downward, it and'thereby, bythis means the sudden movement of the weight pan up, is not transmittedto, and cannot be imparted tot-he indicating. mechanism. In connectionwith this arm or lever, which is 0 rated through the permanent weight reerred to, there .are pendant weights acting as resistances, mounted thesame vertical plane .as the fnlcrnmnf Specification of Letters Patent.

Application filed lay 18, 1918, Serial No. 880,5.

e lever or arm which it oper-- itivey-press up said lever or.

the arm or lever, to which they are connected; and the levers or bars ofthese weights are connected with the pointing or ndicating finger orlever, or the like, w ich moves over or in connection with a stationaryweight scale; or with a moving scale, which operates in connection witha stationar pointer.

he invention will be furtherdescribed by the aid of the accompanyingdrawings, which illustrates a weighing machine provided withimprovements hereunder.

In the drawings, Figure 1 is.& side eleva-' tion, and Fig; 2 a plan ofthe machine. Fig. 3 shows in detail a front elevation of the weighingmechanism; and Fig. 4 is a side elevation of it; and'Figs. 5 and 6illustrate parts of the mechanism in different pos'tions. Figs. 7 and 8are diagrams illustrating the possible alternative relative positions ofthe parts of the machine, shown in F i s. 1 and 2.

Re erring now to the drawings, 1 is the base of the machine in which thepan su porting levers are placed; 2 is the sea e weight pan; 3 is thegoods pan; his the indicating inter, pivoted at 6; and sure weightsca-e, over which it works.

10 is the constant weight above referred Patented May 6, 1913.

to, which is used'in connection with the scale weight pan 2, and theindicating mecha-' nism; 11 is the armor lever-+p1vot'ed on knife edgesat 12which the weight 10 crates on, and works in connection ,wi

and 13 are weights, Exported on the-pendantarms 14 to the leverorarm 11through t e cross head 15), which aot as the resistances. The weightedarms 14 are mounted in the same vertical plane as the fulcrum 12 ofthearm 11; and they are a link 7, and 0 rate it.

With rega to the free movement arrangement above referred to, connectedwith the constant weight 1.0, and .arm or lever 11,

connected to the indicating pointer 4, by

this, in the case shown, consists of an elongated loop or eye 17,formedin' the upper part of the rod 8 connecting the weight 10 with thearm 11; and a corresponding eye or loop at 18, in the lower portion ofthe rod 8, by which, when the weight 10 is moved that the suddenmovement of the weight pan upward, is not transmitted to, and cannot beimparted to the weighing and indicating mechanism, In the constructionand arrangement of weighing machine shown in the drawings,.this scaleweight pan 2 has upon it a projection 20, and at one side of it; andthis projection operates upon the bottom of a recess in the constantwelght l0.

The wei ht 10 should not be less than the capacity 0 the weighingindicator scale 5. For instance, in the case shown in the draw ings, the.scale 5 extends from zero to 2 pounds, and consequently, according tothis rule, the weight 10 would be 2 pounds.

A dash pot arrangement 9 of any known suitable kindis used in connectionwith the.

weighing mechanism and in the case shown,

is disposed on the opposite side of the fulcrum 12 to the lever or arm11. By this means the motion of the weighing mechanism by the pendantresistance weighted levers 14, when the permanent weight 10 ceases toact on the weighing mechanism, due

.to a suddenmovement as referred to, will slowly move to the correctposition, whatever it may be. Moreover, in the action of thiscontrolling dash ot, the weighing mechanism will travel bac to zerounder the ac tion of" the permanent weight when the goods are suddenlytaken off the goods pan 3, which causes the wei t pan to suddenly fall;but the speed 0 movement of the weighing mechanism is governed by thedash pot.

In operation, a weight is put on the weight an 20f the scale,.aproximately equal to, ut less than the weig t of the goods to beweighted. The goods are then put on the weighing pan 3, and the amountshown on the indicator scale 5, plus the weight on the weight .pan 2,will, together, equal the whole upward stroke of the pan 2, act suddenlyon the weight indicating mechanism. With nothing on the pans 2, 3, theindicating pointer 4 will be standing at zero, with the weights 13standi in a position of potential to the left han side of the plane ofthe fulcrum of the arm 11, being held there by the weight 10. If thecode placed on the ds scale 3 are considerably in excess'of e combinedweights of the permanent weightlO, and the other weights placed on thepan 2, then the lower partof the rod .8 of the permanent weight 10 willmove independently of the other port-ion ofthis rod,

and so, as it were, automatically disconnect these parts from theweighing lever 10 and weighted arms .14; and so allow the wei hts 13 toact on the indicatin pointer 4, an to be moved over the scale 5 thependant resistant weights 13. Hence y this means, all sudden weight orstrain coming on the weighing or indicatin mechanism, will be avoidedunder such circumstances. If on the other hand, the goods are suddenlytaken off the goods pan 3, the weighing pan 2 will descend suddenlyunder the action of the weights on it; in which case, the rojection orpart 20 of the weight pan, whic operates --in connection with thepermanent weight 10,

- will leave the wei ht; and so, under the action of the control ingdash pot 9, the weighing mechanism will travel back to zero, under theaction of the permanent weight 10, (the pendent weights 13 then standingout atan inclination to the left hand side of the vertical plane of thefulcrum); the speed of the movement being-governed by the dash pot. Thelatter condltion is illustrated by en nothing is on the weighingmachine, the projection or like device 20 on the weight pan, will bejust touching the ermanent weight with a small pressure; an when theweightson the two pans 2 and 3 are nearl equal to the weight of thegoods, there wil be practically no separate action between the permanentweight and the weighing mechanism, and therefore, no sudden action.

In the case shown in the drawings, the pointer or indicator 4 is fixedon a suitable spindle below, and its upper indicatin end may bebifurcated, as indicated in 1g. 4, and one pointer arranged to work oneach side of the scale 5, so that if the scale is marked on each side,it can be read from both sides.

The weighing mechanism maybe inclosed in a suitable casin with windowsop site the scales 5, as in icated by the dott lines marked 21. t 1 IThe weight indicating and weighing mechanism may be disposed in anyposition in relation to the pans. For instance, in Fig. 1, it isarranged between them, the general lane of the scale, and the path inwhich t e indicator moves, being parallel with the general verticalplane ofthe machine. Or the scale may be arranged in the same relativeplane. as that shown in Figs. 1 and 2, but to one side of the transversecentral plane of the machine, as indicated in Fig. 7. Or again, it maybearranged in a transverse lane at right-angles to the generai yergica'plane of the machine, as shown in Y W h fle the chief object of theinvention, as

stated, is to provide improvements whereby I sudden jar on the mechanismis eliminated almost entirely, yet the object also is to provide aweighing machine of the character referred to, which, generallyspeaking, is an improvement on weighing machines of the kind referredto, as hitherto proposed.

What I claim is 1. A weighing machine, comprising a weight carrier, aload carrier, and indicating means, a constant weight cooperating withthe weight carrier, operating connections between the constant weightand the indicating means to permit operation of the latter, theoperating connections serving to exert a normal upward pull on theconstant weight and constructed to break said operating'connection whena load is suddenly thrown on the load carrier.

2. A. weighing machine, comprising a weight'carrier, a load carrier, anindicating device, weight operating means, a constant weight normallyholding the weight carrier in weighted position, and a connect-ionbetween the constant weight and the indicatingdevice to hold the laterin zero position when the weight carrier is in weighted position, saidconnection including a device which breaks the connect-ion when a loadissuddenly thrown on the load carrier, the 'connection serving to exerta normal upward pull on the constant weight.

' 3f Aweighing machine, comprising a load carrier, a weight carrier, aconstant weight supported byv and in loose contact with the weightcarrier, indicating means including a device for operating the same andconnecting means between the constant weight and the indicating means topermit operation of the latter when a load is placed on the loadcarrier, said connecting means including means which will permit theconstant weight and the weight carrier to move quicker than theindicating means when a load is suddenly thrown on the load carrier, andserves to exert a normal u'pward pull on the constant weight.-

4. A weighin machine, comprising a load carrier, a weig t carrier, aconstant weight looselymounted on the weight carrier, indieating meansincluding a pointer and. a

means for operating same, and a connection between the constant weightand the indicatin means including interlooped, elongat members, the saidconnection serving to exert a normal upward pull on the con.- stantweight, whereby when a load is suddenly thrown onthe load carrier, theconstant weight will move faster than the pointer, and break saidconnection.

5. A weighing machine, comprising a load carrier, a weight carrier, aconstant weight loosely mounted on the weight carrier, indicating meansincluding a pointer, and means for operating the same, means forcushioning the movement of the pointer, and means between the constantweight and the indicating means to permit the means for opercator,should a load be suddenly placed on the load carrier, the means betweenthe constant weight and the indicatin means serving to exert a normalupwar pull on the constant weight.

6. A weighing machine, comprising a load carrier, a weight carrierprovided with a projection, a constant weight having a seat whichreceives the projection, a stem extending from the constant weight andformed at its end with an elongated eye, a pivoted pointer, a pivotedbar having arms, weights on the arms, whichse'rves to exert a normalpull on the constant-weight, a link connecting one of the arms and thepointer, and a stem secured to the pivoted bar and formed at its freeendwith an elongated eye which is looped with the eye on the stemextending from the constant weight.

7. A weighing machine, comprising a load carrier, a weight carrierprovided with a projection, a constant weight having a seat whichreceives the projection, a stem extending from the constant weight andformed at its ends with an elongated eye, a pivoted pointer, a pivotedbar having arms, weights on the arms which serves to exert a normal pullon the constant weight, a link connecting one of the arms and thepointerand a stem secured to the pivoted bar and formed at its free end with anelongated eye which is looped with the eye on the stem extend ing fromthe constant weight, a dash pot, a

rod extending from the'plvoted rod, and a piston on the rod, said pistonoperating in.

the dash pot.

8. A weighing scale, comprising a load carrier,-a weight carrier,indicating mechanism and means between the weight carrier and theindicating means for operating the latter including two members one ofwhich is formed with a slot to receive the other said member and aconstant weight so constructed that the weight carrier and the constantweight may be depressed quicker when a weight. is suddenly thrown onsaid wei ht carrier than the movement of the indicating means, and also.ermits of the weight carrier rising' faster t an the movement of theindicating means when a load is suddenly thrown onthe load carrier.

In testimony whereof Ihave signed my name to this specification in thepresence of two subscribing witnesses.

' Y JAMES DOBSON.-

Witnesses:

SOMERVILLE GooDALE, RICHARD CUTHBERT ROYSTON;

00p! of this potent may be obtained to. Me cents each, by soda-caningthe Commissioner of Intent,

Washington, D. 0.

